GOG now has a stand-alone client. This is pretty big. It's not going to kill Steam or anything, but it seems like it's in place to become the first real competition given Origins abysmal launch.
Certain games use Galaxy for their online now, so the alpha is being given out to people with those games.
Looks like you can sign up for the alpha here: http://www.gog.com/galaxy/alpha Info regarding that can be found here: http://www.gog.com/forum/general/gog_galaxy_client_closed_alpha
Well I just got access to the alpha and so far it's looking pretty good. -8/10 can't play pa with it A screenshot if anyone's interested in seeing what it looks like Spoiler: galaxy
My only gripe so far has been that I can't figure out a way to arbitrarily group my games. I'd put it at 9/10 since you CAN play TA with it.